Pops & Drops: Fortress, Sony...

Following are the day’s biggest winners and losers. Find out why shares of Fortress Investment Group and Infosys popped while Sony and Barclays dropped.

POPS (stocks that jumped higher)

iShares Dow Jones US Real Estate ETF (IYR) popped 3%. A JPMorgan analyst boldly upgraded Boston Properties and other select names because he believes they have the balance sheets to weather another tough year for commercial real estate. - Expect a bumpy ride, counsels Karen Finerman.

Stock Pops & Drops

The Fast Money guys take a look at todayâ??s biggest market movers.

KeyCorp (KEY) popped 6%. This and other regional banks closed higher after Dick Bove of Ladenburg Thalmann said he did not foresee further failures in the American banking system. - Also the yield curve is starting to play into their favor, explains Guy Adami.

Fortress Investment Group (FIG) popped 15%. The private-equity firm jumped today continuing it’s new year rally. However, shares lost as much as 90% of their value last year. - It's a good pop for them, says Guy Adami.

Infosys Technologies (INFY) popped 6%. The firm reported record-breaking third-quarter profits due in part to an increase in outsourcing contracts from clients looking to cut down on costs. - I own this stock, says Tim Seymour.

Oil Service HOLDRS ETF (OIH) popped 2%. Oil prices settled higher on Tuesday, bolstered by cold weather in the United States and comments by OPEC member Saudi Arabia that it had made deep production cuts. - I sold my puts on the OIH, says Karen Finerman. Hoping to see a bounce, now.

Zymogenetics (ZGEN) popped 25%. The small biotech announced a partnership with Bristol-Myers Squibb to co-develop its hepatitis C drug PEG-interferon lambda. - The partnership could be worth $1 billion, adds Pete Najarian.

DROPS (stocks that slid lower)

Sony (SNE) dropped 4%. Media reports out of Japan suggested the company will post record losses this year due to a slump in chip and electronics sales. - I think it could slide to $22, says Tim Seymour.

Lexmark International (LXK) dropped 13%. Fourth-quarter revenue fell about 17%, more than expected, and the company announced layoffs. - It's all bad things, says Pete Najarian.

Boeing (BA) dropped 3%. Credit Suisse downgraded the stock to “neutral” from “outperform,” and said aerospace suppliers will continue to lower their prices in the face of dropping demand. - Be careful here, says Karen Finerman.

Adobe Systems (ADBE) dropped 7%. Friedman, Billings, Ramsey downgraded the stock to “underperform” from “market perform” and said the company’s shares have risen to a point where the risk-reward profile is unfavorable. - It might be an opportunity at this level, says Pete Najarian.

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